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All Cepheids are giants, but not all giant stars are Cepheid variables.
Confidence Interval
A confidence interval is a range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter.
Sample Size
The number of observations or data points used in a statistical analysis.
Confidence Interval
A range of values, derived from the sample data, that is believed, with a certain probability, to contain the true population parameter.
Population Mean
The average of all the individuals or items in a population, calculated as the sum divided by the total number in the population.
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